GB1359662A - Data communication systems - Google Patents

Data communication systems

Info

Publication number
GB1359662A
GB1359662A GB3553471A GB3553471A GB1359662A GB 1359662 A GB1359662 A GB 1359662A GB 3553471 A GB3553471 A GB 3553471A GB 3553471 A GB3553471 A GB 3553471A GB 1359662 A GB1359662 A GB 1359662A
Authority
GB
United Kingdom
Prior art keywords
sub
priority
channels
controller
scanner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3553471A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Publication of GB1359662A publication Critical patent/GB1359662A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/22—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling
    • G06F13/225—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling with priority control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/24—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters
    • H04L5/245—Arrangements affording multiple use of the transmission path using time-division multiplexing with start-stop synchronous converters with a number of discharge tubes or semiconductor elements which successively connect the different channels to the transmission channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

1359662 Data transmission HONEYWELL INFORMATION SYSTEMS Inc 28 July 1971 [30 Sept 1970] 35534/71 Heading G4A [Also in Division H4] A data communications controller 5 is connected by sub-channels 6a-6n to terminal devices 11a-11n. Normally the sub-channels are scanned in sequence by a first scanner, but, when a priority switch is closed, one of a number of combinations of sub-channels can be chosen, using a selector switch, which combinations have priority over the others and are scanned by a second scanner. The priority switch is closed when one or more of the terminals requests such action and when no priority requests are received normal scanning is resumed. A data processor 1 is connected to a memory controller 2 and a memory 3 (e.g. magnetic core), and controller 2 is connected by multiplexer 4 to controller 5 and the sub-channels 6a-6n (e.g. 32 of them). Each sub-channel is connected to a terminal device 11a-11n, e.g. magnetic tape handler, paper tape or punched card readers by a telephone line. The controller 5 includes the first and second scanners which are counters (Fig. 3a, not shown) and a decoding matrix which supplies enable signals to the subchannels. The second scanner can scan either 2, 4, 8, or 16 sub-channels as priority though if an odd number, e.g. 3 or 5 is required to have priority a modified system (Fig. 7, not shown) may be used.
GB3553471A 1970-09-30 1971-07-28 Data communication systems Expired GB1359662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7678770A 1970-09-30 1970-09-30

Publications (1)

Publication Number Publication Date
GB1359662A true GB1359662A (en) 1974-07-10

Family

ID=22134183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3553471A Expired GB1359662A (en) 1970-09-30 1971-07-28 Data communication systems

Country Status (6)

Country Link
US (1) US3723973A (en)
JP (1) JPS5512778B1 (en)
CA (1) CA955336A (en)
DE (1) DE2148956C3 (en)
FR (1) FR2108113B3 (en)
GB (1) GB1359662A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE36989E (en) * 1979-10-18 2000-12-12 Storage Technology Corporation Virtual storage system and method
US6529996B1 (en) 1997-03-12 2003-03-04 Storage Technology Corporation Network attached virtual tape data storage subsystem
US6658526B2 (en) 1997-03-12 2003-12-02 Storage Technology Corporation Network attached virtual data storage subsystem
US6834324B1 (en) 2000-04-10 2004-12-21 Storage Technology Corporation System and method for virtual tape volumes
US6925525B2 (en) 1998-07-06 2005-08-02 Storage Technology Corporation Data storage management system and method
US7114013B2 (en) 1999-01-15 2006-09-26 Storage Technology Corporation Intelligent data storage manager

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828325A (en) * 1973-02-05 1974-08-06 Honeywell Inf Systems Universal interface system using a controller to adapt to any connecting peripheral device
US4296464A (en) * 1977-03-03 1981-10-20 Honeywell Inc. Process control system with local microprocessor control means
US4688212A (en) * 1985-01-31 1987-08-18 Harris Corporation Centralized image responsive telephone time slot interchange system
US4809164A (en) * 1986-03-26 1989-02-28 Tandem Computers Incorporated Processor controlled modifying of tabled input/output priority
US4954950A (en) * 1986-09-17 1990-09-04 International Business Machines Corporation Terminal communications circuit
US5218552A (en) * 1990-07-30 1993-06-08 Smart House, L.P. Control apparatus for use in a dwelling
US6665733B1 (en) * 1996-12-30 2003-12-16 Hewlett-Packard Development Company, L.P. Network communication device including bonded ports for increased bandwidth
US6098109A (en) * 1996-12-30 2000-08-01 Compaq Computer Corporation Programmable arbitration system for determining priority of the ports of a network switch
US6272113B1 (en) 1998-09-11 2001-08-07 Compaq Computer Corporation Network controller system that uses multicast heartbeat packets
US6229538B1 (en) 1998-09-11 2001-05-08 Compaq Computer Corporation Port-centric graphic representations of network controllers
US6381218B1 (en) 1998-09-11 2002-04-30 Compaq Computer Corporation Network controller system that uses directed heartbeat packets
US8954007B2 (en) * 2011-08-12 2015-02-10 Wicentric, Inc. Systems and methods for low power short range wireless device communication scanning

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26984A (en) * 1860-01-31 Improved paddle-wheel
BE638436A (en) * 1962-10-15
US3331055A (en) * 1964-06-01 1967-07-11 Sperry Rand Corp Data communication system with matrix selection of line terminals
US3350697A (en) * 1965-02-24 1967-10-31 Collins Radio Co Storage means for receiving, assembling, and distributing teletype characters
US3407387A (en) * 1965-03-01 1968-10-22 Burroughs Corp On-line banking system
US3534339A (en) * 1967-08-24 1970-10-13 Burroughs Corp Service request priority resolver and encoder
US3618039A (en) * 1969-07-28 1971-11-02 Honeywell Inf Systems Data communication system including automatic information transfer control means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE36989E (en) * 1979-10-18 2000-12-12 Storage Technology Corporation Virtual storage system and method
US6529996B1 (en) 1997-03-12 2003-03-04 Storage Technology Corporation Network attached virtual tape data storage subsystem
US6658526B2 (en) 1997-03-12 2003-12-02 Storage Technology Corporation Network attached virtual data storage subsystem
US6925525B2 (en) 1998-07-06 2005-08-02 Storage Technology Corporation Data storage management system and method
US7873781B2 (en) 1998-07-06 2011-01-18 Storage Technology Corporation Data storage management method for selectively controlling reutilization of space in a virtual tape system
US7114013B2 (en) 1999-01-15 2006-09-26 Storage Technology Corporation Intelligent data storage manager
US6834324B1 (en) 2000-04-10 2004-12-21 Storage Technology Corporation System and method for virtual tape volumes

Also Published As

Publication number Publication date
DE2148956A1 (en) 1972-04-06
DE2148956C3 (en) 1980-01-24
FR2108113B3 (en) 1974-06-07
US3723973A (en) 1973-03-27
FR2108113A3 (en) 1972-05-12
DE2148956B2 (en) 1979-05-31
CA955336A (en) 1974-09-24
JPS5512778B1 (en) 1980-04-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee